94-25-10: AFM - Icing Conditions

94-25-10 BEECH AIRCRAFT CORPORATION and MITSUBISHI HEAVY INDUSTRIES (MHI), LTD.: Amendment 39-9094. Docket 94-NM-204-AD. Applicability: All Beech Model 400, 400A, 400T, and MU-300-10 airplanes; and all Mitsubishi Model MU-300 airplanes; certificated in any category. Compliance: Required as indicated, unless accomplished previously. To prevent uncommanded nose-down pitch at flap settings exceeding 10 degrees during icing conditions, accomplish the following: (a) Within 20 days after the effective date of this AD, revise the Limitations Section and Normal Procedures Section of the FAA-approved Airplane Flight Manual (AFM) to include the following statement. This may be accomplished by inserting a copy of this AD in the AFM. "ICING CONDITIONS If icing conditions are encountered during flight, no greater than 10 degrees flaps may be utilized for landing unless the following conditions are met: 1. The icing conditions were encountered for less than 10 minutes, and the Ram Air Temperature (RAT) during such encounter was warmer than -8 degrees C. OR 2. A RAT of +5 degrees C or warmer is observed during approach and landing. If either of the above two conditions are met, 30 degrees flaps may be utilized for landing. Otherwise, Flaps (landing flaps setting)..........................................................10 degrees Land Select (LAND SEL) Switch........................................Flaps 10 degrees For Mitsubishi Model MU-300 airplanes: Use landing data for 10 degrees flaps from Section 6, Performance. For Beech Model 400, 400A, 400T, or MU-300-10 airplanes: Use landing data for 10 degrees flaps from Appendix 1 of this AD." (b) An alternative method of compliance or adjustment of the compliance time that provides an acceptable level of safety may be used if approved by the Manager, Wichita Aircraft Certification Office (ACO), FAA, Small Airplane Directorate. Operators shall submit their requeststhrough an appropriate FAA Principal Maintenance Inspector, who may add comments and then send it to the Manager, Wichita ACO. NOTE: Information concerning the existence of approved alternative methods of compliance with this AD, if any, may be obtained from the Wichita ACO. (c) Special flight permits may be issued in accordance with sections 21.197 and 21.199 of the Federal Aviation Regulations (14 CFR 21.197 and 21.199) to operate the airplane to a location where the requirements of this AD can be accomplished. (d) This amendment becomes effective on December 28, 1994. FOR A COPY OF APPENDIX 1 THAT WAS MANUALLY ADDED TO THIS AD, CALL AFS-613 AT (405) 954-6896.